Categry Cloud

Forms and dialogs in Windows Forms are windows that contain controls. They can be different types: to have or to not have a frame, to be modular or not to be, to be stretchable or not to be, to be above all other windows or not to be, and so on.
The System.Windows.Forms.Form class
The System.Windows.Forms.Form class is a base class for all for

Define string variable with the text of the combobox item that has to be selected. For example, if the combobox items have text values "item_a" "item_b" "item_c" ... and the item which text is "item_b" has to be selected

To prevent users from entering incorrect data in Windows form application, set restriction to allow only specific characters to be entered in the text box.This example uses KeyPress event to monitor the users input and to apply the restriction required.To avoid code duplication in Windows multiform applications for example, a separate class file is created “CommonFunctions.cs”.The function to allow only numbers in textbox control is named InputNumbers.For each Windows form, create a single KeyPress event and call the InputNumbers function inside it.

In order to draw shapes in C# a start point and end point coordinates, and a Pen control must be defined first.Coordinates in C#The value of x is the location of the point along the x-axis, the 0 is at the extreme left. The value of y is the location of the point along the y-axis, the 0 is at the extreme top.